Polls opened at 9 a.m. Local time (0700GMT), on the first of three days of voting.
Sisi cast his vote in Cairo as the polls opened, state TV reported.
The authorities in Egypt are keen to secure the polls, in the hopes that a high voter turnout will enhance the credibility of the election.
The election’s security plan includes securing polling stations and the judges monitoring the elections during the voting and stay in place until the end of the vote counting process.
The armed forces are also tasked with securing all state vital institutions, archeological sites and all main streets during the election and the period after electing the president.